期刊
SCRIPTA MATERIALIA
卷 213, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2022.114571
关键词
Hydrogen metallurgy; Direct reduction; Iron oxides; Microstructure; Multiscale
类别
资金
- Deutsche Forschungsgemeinschaft [468209039]
- CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior -Brazil)
- Alexander von Humboldt Foundation [88881.512949/2020-01]
- [ERC-CoG-SHINE-771602]
Fossil-free ironmaking is crucial for reducing CO2 emissions in the steel industry. Hydrogen-based direct reduction (HyDR) is a promising green iron-making solution. However, the underlying mechanisms of this process, involving complex interactions of chemical, physical, and mechanical phenomena, and the formation of various defects, are not well understood.
Fossil-free ironmaking is indispensable for reducing massive anthropogenic CO2 emissions in the steel industry. Hydrogen-based direct reduction (HyDR) is among the most attractive solutions for green iron-making, with high technology readiness. The underlying mechanisms governing this process are characterized by a complex interaction of several chemical (phase transformations), physical (transport), and mechanical (stresses) phenomena. Their interplay leads to rich microstructures, characterized by a hierarchy of defects ranging across several orders of magnitude in length, including vacancies, dislocations, internal interfaces, and free surfaces in the form of cracks and pores. These defects can all act as reaction, nucleation, and diffusion sites, shaping the overall reduction kinetics. A clear understanding of the roles and interactions of these dynamically-evolving nano-/microstructure features is missing. Gaining better insights into these effects could enable improved access to the microstructure-based design of more efficient HyDR methods, with potentially high impact on the urgently needed decarbonization in the steel industry (C) 2022 The Author(s). Published by Elsevier Ltd on behalf of Acta Materialia Inc.
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